27965081 has 4 divisors (see below), whose sum is σ = 28720932. Its totient is φ = 27209232.

The previous prime is 27965039. The next prime is 27965083. The reversal of 27965081 is 18056972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25593481 + 2371600 = 5059^2 + 1540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27965081 is a prime.

It is a super-2 number, since 2×27965081² = 1564091510673122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27965083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377870 + ... + 377943.

It is an arithmetic number, because the mean of its divisors is an integer number (7180233).

Almost surely, 2^27965081 is an apocalyptic number.

It is an amenable number.

27965081 is a deficient number, since it is larger than the sum of its proper divisors (755851).

27965081 is an equidigital number, since it uses as much as digits as its factorization.

27965081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755850.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 27965081 is about 5288.2020574104. The cubic root of 27965081 is about 303.5326129498.

The spelling of 27965081 in words is "twenty-seven million, nine hundred sixty-five thousand, eighty-one".